runway /'rAnwe./ a strip of level, usually paved ground on which
aircraft take off and land 0 Heathrow airport has four terminals and two main runways. 0 To achieve a safe landing, an aircraft has to be controlled so that its wheels make contact with the run-way smoothly. 0 The aircraft lined up perfectly on the runway extended centre line. Abbreviation R/W
COMMENT: Large airports often have more than one runway, arranged to cope with varying wind directions. Some busy airports have parallel runways which can be used simultaneously.
runway visual range /，rAnwe. 'v.3u.l ，re.nd3 / noun the distance along a runway at which selected lights can be seen, adjusted to simulate approach visibility 0 Runway visual range is obtained by an observer stand-ing at the side of the runway in the vicinity of the threshold counting the number of markers or lights visible along the side of the runway. Abbrevia-tion RVR
rupture /'rApt../ noun the process of breaking open or bursting 0 Pressure in the fuel tanks must be controlled to pre-vent rupture or collapse. _ verb to break open or burst 0 The impact ruptured the fuel tank.
RVR abbreviation runway visual range R/W, RWY abbreviation runway
S
S abbreviation south safe /se.f/ adjective free from danger .
Approach to land must be made at a safe speed. . safe landing a landing which does not endanger people or damage the aircraft. . fail safe
safeguard /se.fɑd/ noun some-thing done as a precaution . A propeller is feathered after engine failure, or as a safeguard when low oil pressure or excessive temperature have indicated the development of a possible defect. .
verb to take action to make sure that something is protected from harm . A pressure maintaining valve is generally used to safeguard operation of impor-tant services, such as flying controls and wheel brakes.
safe life /se.f la.f/ noun the principle of putting the least load or force on each component, so that it will last well beyond a plane’s expected life
safety /se.fti/ noun freedom from danger, injury or risk . Turbulence can have serious effects on aircraft safety and performance and makes air travel uncomfortable. . safety conscious the state of being aware at all times of the importance of safety and the means by which it is achieved and maintained
safety pilot /se.fti pa.l.t/ noun a
pilot present in the cockpit to ensure the safety of the flight, e.g. when a student is practising instrument flying
safety regulations /se.fti rejυle..(.)nz/ plural noun rules or laws which must be followed to make a place safe . Equipment and furnishings on modern jet transports must comply with safety regulations concerning fire resistance.
safety straps /se.fti strps/ plural noun device to keep a person in position in a seat
sailplane /se.lple.n/ noun a light glider particularly well adapted to mak-ing use of rising air currents
St Elmo’s Fire /s.nt elm.υz fa../
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